Continuous delivery is a powerful concept, but hard to achieve. One of the challenges is automating the setup of environments and the deployment of the Java EE applications. We have looked at and used quite some tools like for instance Chef, Puppet, Vagrant and Nolio. All tools had one thing in common: we had never used them. Why should we invest time in mastering those tools? There is a perfect alternative in Jenkins, a tool most developers are familiar with. Besides the basic Jenkins buildserver capabilities it offers quite some useful plugins like the Build Pipeline plugin. To setup environments the popular Docker project is used. Docker allows you to create containers from any application. Only some knowledge is required for the setup of the containers. The rest of the configuration is done through commands most people are quite familiar with.

1. Johan Janssen, Info Support

2. Continuous Delivery
DockerDocker
Jenkins build pipeline
Questions

3. Automate everything
Software quality
Continuous improvement
Regular deployments
Anyone can deploy

4. DevOps End users

6. Automate environment provisioning
Automate application deployment

13. Simple general commands
No Domain Specific Language (DSL)
Configuration with operating system commands
Disk space efficiency
Memory efficiency
Speed
Compatibility (run anywhere)
Isolation

15. Since March 2013
Soon: 1.0 production ready release
Around 400 contributorsAround 400 contributors
1.2M+ container downloads

16. Docker on Ubuntu 14.04
apt-get install docker.io
docker.io run -i -t ubuntu:saucy
/bin/bash

19. FROM ubuntu:saucy
# Add oracle java 7 repository
RUN apt-get -y install software-properties-common
RUN add-apt-repository ppa:webupd8team/java
RUN apt-get update && apt-get -y upgradeRUN apt-get update && apt-get -y upgrade
# Accept the Oracle Java license
RUN echo "oracle-java7-installer shared/accepted-oracle-license-
v1-1 boolean true" | debconf-set-selections
# Install Oracle Java
RUN apt-get -y install oracle-java7-installer
ENV JAVA_HOME /usr/lib/jvm/java-7-oracle

20. FROM GeneralBase
RUN apt-get install -y wget unzip
RUN wget
http://dist.sonar.codehaus.org/sonarqube-http://dist.sonar.codehaus.org/sonarqube-
4.2.zip
RUN unzip sonarqube-4.2.zip -d /opt
RUN rm sonarqube-4.2.zip
EXPOSE 9000
EXPOSE 9092
CMD ["/opt/sonarqube-4.2/bin/linux-x86-
64/sonar.sh", "console", "/bin/bash"]

21. Create ‘Dockerfile’
Build the containers:Build the containers:
docker.io build -t GeneralBase .
docker.io build -t Sonar .
Start proces:
docker.io run -p 9000:9000
–p 9092:9092 -d Sonar

22. # docker.io ps –a
CONTAINER ID: ecbecf77461b
IMAGE: Sonar:latest
COMMAND: /opt/sonarqube-4.2/bCOMMAND: /opt/sonarqube-4.2/b
CREATED: 32 minutes ago
STATUS: Up 32 minutes
PORTS: 0.0.0.0:9000->9000/tcp,
0.0.0.0:9092->9092/tcp
NAMES: sick_nobel

23. Start / stop / restart
docker.io [start / stop / restart] containerid
Show processes running in container
docker.io top containerid

24. Create image from container
docker.io commit containeriddocker.io commit containerid
username/imagename
docker.io push username/imagename

25. GeneralBaseGeneralBaseGeneralBaseGeneralBase
AppServerBaseAppServerBaseAppServerBaseAppServerBase JenkinsJenkinsJenkinsJenkins SonarSonarSonarSonar GitblitGitblitGitblitGitblit NexusNexusNexusNexus
Environment DEnvironment DEnvironment DEnvironment D
Environment TEnvironment TEnvironment TEnvironment T
Environment AEnvironment AEnvironment AEnvironment A
Environment PEnvironment PEnvironment PEnvironment P
JenkinsDataContainerJenkinsDataContainerJenkinsDataContainerJenkinsDataContainer

26. Dockerfile
ENV JENKINS_HOME /var/JenkinsData
Docker commandsDocker commands
docker.io run -v /var/JenkinsData –name
JenkinsDataContainer ubuntu:saucy true
docker.io run -p 8080:8080 --volumes-from
JenkinsDataContainer -d Jenkins

27. # docker.io images --tree
└─ 179.9 MB Tags: ubuntu:saucy
└─253.6 MB
└─741.8 MB Tags: GeneralBase:latest
└─763.6 MB Tags: AppServerBase:latest└─763.6 MB Tags: AppServerBase:latest
├─763.6 MB Tags: EnvironmentP:latest
├─763.6 MB Tags: EnvironmentA:latest
├─763.6 MB Tags: EnvironmentT:latest
└─763.6 MB Tags: EnvironmentD:latest
└─865.6 MB Tags: Nexus:latest
└─808.3 MB Tags: Gitblit:latest
└─901.5 MB Tags: Sonar:latest
└─805.4 MB Tags: Jenkins:latest

31. Stop containers
docker.io stop $(docker.io ps -a -q)
Remove containersRemove containers
docker.io rm $(docker.io ps -a -q)
Remove images
docker.io rmi $(docker.io images -q)

32. real 4m11.729sreal 4m11.729s
user 0m3.329s
sys 0m10.054s

34. Simple to use
Really popular
Used in many organizations
Regular updatesRegular updates
Big community creating plugins etc.
Most developers already use it

38. Continuous delivery
Continuous deployment

40. 1
2
5
3
4
5
6
7
8

43. Execute job after several (parallel) jobs are finished.
FirstJob
ParallelJob1
ParallelJob2
LastJob

46. Good looking join
Complex workflow
EtceteraEtcetera
Advantage: Jenkins jobs are the basis
and can be reused.
Try to keep it simple!

47. Build Flow Plugin
oDomain Specific Language
oFeatures like retry, parallel,oFeatures like retry, parallel,
guard/rescue (similar to try/finally)
Multijob Plugin
Delivery Pipeline Plugin

48. johan.janssen@infosupport.com